Resizing the Window overrides bindings on Overlay.overlay

import QtQuick
import QtQuick.Window
import QtQuick.Controls.Basic

Window {
    id: window
    width: 640
    height: 480
    visible: true

    property int virtualWidth: (window.contentOrientation === Qt.PortraitOrientation || window.contentOrientation === Qt.InvertedPortraitOrientation) ? window.height : window.width
    property int virtualHeight: (window.contentOrientation === Qt.PortraitOrientation || window.contentOrientation === Qt.InvertedPortraitOrientation) ? window.width : window.height

    // This is supposed to make it work, as hinted by https://doc.qt.io/qt-6/qml-qtquick-controls-popup.html#popup-sizing
    Overlay.overlay.width: window.virtualWidth
    Overlay.overlay.height: window.virtualHeight
    Overlay.overlay.anchors.centerIn: window.contentItem

    Item {
        id: container
        width: window.virtualWidth
        height: window.virtualHeight
        anchors.centerIn: parent
        
        // ...
    }
}